SmartDeviceMonitor for Admin is a Windows utility software that simplifies all aspects of installation, monitoring, and management of network devices. SmartDeviceMonitor for Admin tells you precisely what printers are available, how they are configured, even toner and paper levels.

Most Printer and Copier manufacturers have there own these days, you can install it and it will pick up various things on your network, for example: i have all OKI printers but the printer manager also picks up Canon copier and both Toshiba copiers, ask who ever you get your main printers or copiers from or both, it's usually free (i've never paid for it anyway)

Spiceworks also has the ability to do this but you will need to ask others if you want to know how to use it